The subclass of triglyceride -rich lipoproteins - remnant -like particles (RLP) seems to be strong and independent risk factor for cardiovascular disease. We eva luated the role of RLP and other risk factors (RF) with sonographically measured intima - media thickness of carotid arteries (IMT CCA) in a cohort of Czech population including women defined according to the time after menopause. We investigated relation of IMT CCA to age, weight, central obesity, plasma lipids including remnant -like particles cholesterol (RLP -C) and triglycerides (RLP -TG) in 136 men and 160 women. Using multiple linear regression analysis, significant association between IMT CCA and RLP -C was found in women 1 -7 years after menopause. In the whole group of women, only age and fasting blood glucose were independently associated with IMT CCA. In men only age significantly correlated wit h IMT CCA. Significant decrease of all plasma lipids betwe en 1988 and 1996 in men was detected, while in women significant increase in triglycerides and no change in non -HDL cholesterol was observed. RLP -C was the strongest independent RF for atherosclerosis in postmenopausal women but its as sociation with IMT CC A was limited to several years after menopause. In conclusion, women changing reproductive status could be more sensitive to atherogenic impact of remnant lipoproteins., J. Piťha, J. Kovář, Z. Škodová, R. Cífková, P. Stávek, L. Červenka, T. Šejda, V. Lánská, R. Poledne., and Obsahuje bibliografii
At present, the supposed association between venous thromboembolism and atherosclerosis has yet to be proven. However, no data are available from patients with thrombophilias. We evaluated the association between preclinical atherosclerosis and prevalence of thromboembolic events in patients with thrombophilias. Presence of preclinical atherosclerosis in common carotid and femoral arteries measured by ultrasound was assessed by Belcaro score (based mainly on the presence of plaques) and by measurements of intima media thickness in the same location in 109 patients (43 men, mean age 41.5±13 years) with established thrombophilias. Other parameters under the study were age, presence of traditional cardiovascular risk factors, anthropometric and clinical data including blood pressure measurements and medication. The differences between patients with (n=47) and without (n=62) thromboembolic events were assessed by paired t-test and chi square tests. In patients with a history of venous thromboembolism, body mass index and the prevalence of antihypertensive treatment (AT) were significantly higher than in patients without history of thromboembolism (BMI: 26.5±5.0 vs. 24.4±3.7 kg/m2; p=0.04, AT: 25.5 % vs. 8.1 %; p=0.013). No significant differences between groups were found regarding preclinical atherosclerosis. Overweight and hypertension, but not preclinical atherosclerosis, were more prevalent in patients with thrombophilias suffering from thromboembolism., O. Auzký ... [et al.]., and Obsahuje bibliografii a bibliografické odkazy
Attention has recently been focused on endothelial function after a single high-fat meal, i.e. on the anticipated direct atherogenic effect of triglyceride-rich lipoproteins. Our study was designed to investigate the effect of a low-fat diet given for four weeks followed by a high-fat diet for another four weeks. At the end of each dietary period, a non-invasive ultrasound investigation of endothelial function of the brachial artery was performed along with laboratory tests. Endothelial function was measured immediately before the dietary load and after three and six hours in 11 healthy volunteers. The results were expressed as percentage of the changes in artery diameter at rest and during hyperemia; the data were processed using computer technology. When compared to the low-fat regimen, the total cholesterol content rose after the high-fat diet from 4.28 mmol/l to 5.15 mmol/l (p<0.05) in the whole group of volunteers. There was no difference between both dietary regimens in baseline triglycerides. The brachial artery dilatation under basal conditions was 5.26±2.88 mm after the high-fat diet compared with the value of 3.13±3.01 mm (p<0.05) after the low-fat diet. When measured individually endothelial function in the whole group of volunteers in the course of the day, the degree of arterial dilatation after one month on low-fat diet was 3.13±3.0 %, 3.88±2.5 % and 5.23±3.3 % at single measurement. When comparing arterial dilatation at two closest measurements, a non-significant trend, p>0.05 was seen in either case. The following values were obtained after one month on the high-fat diet: 5.26±2.9 %, 4.47±1.7 %, and 6.2±3.6 %; again showing a non-significant trend of p>0.05. In this study, a single high-fat meal at the different dietary regimen did not significantly influence the vasoreactivity of the brachial artery in young volunteers., T. Šejda, J. Kovář, J. Piťha, R. Cífková, E. Švandová, R. Poledne., and Obsahuje bibliografii